I noticed the rubber seal around our over cab window had come loose at all four corners and had a 3 inch gap at the top. A closer inspection and found the seal itself had seen better days and is now pretty rigid so I did some research on how these windows are sealed and the rubber is called "glazing" and decided a replacement was in order. A bit of an eye opener when I looked at pricing from local RV suppliers. Thanks to a thread I read some time ago on this site I looked up Pelland Enterprises and well color me impressed. Just what I needed at half the price and arrived two days after I placed the order. So a shout out to Pelland and 5 stars also whoever posted them. If you need rubber window seals check them out.